Press.



J. THOMSON.

mass. APPLICATION FILED AUG. 1, 1908.

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J. THOMSON.

PRESS.

APPLIOATION FILED AUG. 1, 1908.

Patented May 17, 1910.

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A ttest JOHN THOMSON, OF NEW YORK, N. Y., ASSIGNOR TO JOHN THOMSON PRESSCOMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PRESS.

Specification of Letters Patent.

Application filed August 1, 1908. Serial No. 446,366.

To all whom it may concern:

Be it known that I, JOHN TrroMsoN, a citizen of the United States, and aresident of the borough of Manhattan of the city of New York, in thecounty and State of New York, have invented certain new and usefulImprovements in Presses, of which the following is a specification,reference being had to the accompanying drawings, forming a part hereof.

This invention relates to improvements in the mechanism for effectingthe movements of the form-inking carriage of printing presses. Inanother application I have shown and described a mechanism for drivingthe carriage, which mechanism, as it is shown in that application,involves a articular arrangement which has the effect of moving thecarriage somewhat more rapidly over the inking plate at the top thanacross the form below. It is stated in that application, however, thatother arrangements of the mechanism may be adopted for differentpurposes; and it is the object of the present improvements to presentone other such arrangement which may be adopted for the purpose ofpermitting the form rollers to dwell or rest momentarily upon arevolving inking cylinder or cylinders located above the form. V

In the drawing where the improvements are illustrated and to whichreference will now be had, Figure 1 is a view side elevation of so muchof a press embodying the improvements as will enable the invention to beunderstood, and, Fig. 2 is a diagrammatic view which is furnished toillustrate more clearly the diflerent positions of the parts during anoperating cycle.

Referring first to Fig. 1, the connecting rod 71 is connected as shownto the platen and to the crank pin 7 6 on the crank disk 7 7 On the sameside of the crank disk as that toward which the connectingrod 71 extendsis a lever 78, or rather the upper end of said lever, which is disposedsubstantially vertically, and this upper end is connected. by link 79 tothe crank pin 76. The general direction of this link is toward theplaten, that is toward the side of the crank pin from which theconnecting rod 71 extends. The lever 78 is mounted upon a rocker shaft30 and its lower end is connected by means of a link 31 to an arm 32 ona rocker shaft 33,

and to the rocker shaft 33 a substantially horizontally disposed lever34 is fastened. One end of the lever 34 is operatively connected to theform-inking roller carriage M through the medium of a link 35, and theother end of the lever 34 is provided with a counter weight 36 to offsetthe weight of the carriage. It will thus be seen that the crank 77revolves to effect the impression, the carriage will be reciprocatedback and forth over the form, the crank pin 76 traveling in a circularcircuit and actuating the connections through which the carriage ismoved and efiecting, at each termination of the movement of thecarriage, its reversal with the smoothness and avoidance of shock whichis most perfectly realized by a crank. The balance of the weight of thecarriage by the counter weight 35 tends further to smooth the operationof the parts.

From the diagram of Fig. 2, in which different positions of the crankand of the levers 7 8 and 34 are indicated, the relation or ratiobetween the speed of the carriage at different points in its travel andthe constant angular velocity of the crank, are readily apparent. Itwill be seen, for instance, that while the lever 34 traverses from itsmiddle position to its lower limit and returns, the crank moves 150degrees; and that while said lever travels the same distance from itsmiddle position to its upper limit and returns, the crank executes anangle of 210 degrees. Moreover, it will be seen that near its upperlimit the lever 34 is moving relatively very slowly, for the crank turnsthrough 74 degrees or about onefifth of its cycle while the lever 34moves about 12 degrees in its cycle of 180 degrees or what is aboutone-fifteenth of its complete course. It will be clear, therefore, thatthe nearer the lever 34 approaches its upper limit, the slower it willmove and that at said limit there will be a substantial dwell, which ofcourse the carriage will partake of.

From the foregoing description and analysis, it will appear that slightchanges in the position of the parts and particularly of the lever 7 8and link 79 will be accompanied by corresponding changes in the natureof the motion imparted to the carriage. The improvements, accordingly,are not limited to any particular angular relation between the parts,such as have been set forth above for Patented May 17, 1910.

the sake of clearness, and which obviously may be departed from withoutavoiding the spirit of the invention.

I claim as my invention 1. In a press, the combination with the platenand form-inking carriage, of a crank, a connecting rod connecting theplaten and the crank, a lever one arm of which is on the same side ofthe crank as the platen, a link connecting the crank and said lever, andconnections between the other arm of said lever and the carriage.

2. In a press the combination with the platen and forrn-inking carriage,of a crank, a connecting rod connected thereto through which theimpression is effected, a lever through which the movements of thecarriage are produced, said lever being upon the same side of the crankas the platen, a second lever underneath the first lever and operativelyconnected with the carriage, a

link connecting one end of the first named lever with the crank, andanother link connecting the other end of the first named lever with thesecond named lever.

3. In a press, the combination with the platen and form-inking carriage,of a crank, a connecting rod connecting the platen and the crank, asubstantially vertical lever through which the movements of the carriageare eifected, the upper end of said lever being upon the same side ofthe crank as the platen, a link connecting the crank and said upper endof the lever, and connections between the lower end of the lever and thecarriage.

This specification signed and witnessed this 31st day of July A. D.,1908.

JOHN THOMSON.

Signed in the presence of:

J. It. FRITH, H. O. Onoss.

